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D语言数据库通用操作库 支持 PostgreSQL / MySQL / SQLite

D语言 Database PostgreSQL MySQL SQLite

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#1 冰力

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发表于 2017/06/30 14:44:26

Database

Database abstraction layer for D programing language, support PostgreSQL / MySQL / SQLite.
Example


import std.stdio;
import std.experimental.logger;

import database;

void main()
{
    writeln("run database MySQL demo.");

    auto db = new Database("mysql://root:123456@localhost:3306/test?charset=utf-8");

    int result = db.execute(`INSERT INTO user(username) VALUES("test")`);
    writeln(result);

    foreach(row; db.query("SELECT * FROM user LIMIT 10"))
    {
        writeln(row["username"]);
    }

    db.close();
}

Use DatabaseOption to instantiate a Database object


auto options = new DatabaseOption("mysql://root:123456@localhost:3306/test");
options.setMaximumConnection(5);

auto db = new Database(options);

db.execute("SET NAMES utf8");
API
  • int Database.execute(string sql) Return number of execute result.

    int result = db.execute('INSERT INTO user(username) VALUES("Brian")');
    // if execute error ,db will throw an DatabaseException
  • ResultSet Database.query(sql) Return ResultSet object for query(SELECT).

    ResultSet rs = db.query("SELECT * FROM user LIMIT 10");
  • Statement Database.prepare(sql) Create a prepared Statement object.

   Statement stmt = db.prepare("SELECT * FROM user where username = :username and age = :age LIMIT 10");
  • Statement.bind(param, value) : bind param's value to :param for sql.

   stmt.bind("username", "viile");
   stmt.bind("age", 18);
  • ResultSet Statement.query() Return ResultSet

    ResultSet rs = stmt.query();
    foreach(row; rs)
    {
        writeln(row["username"]);
    }
  • Row Statement.fetch() Return Row

    Row row = stmt.fetch();
    writeln(row["username"]);
  • int Statement.execute() : return execute status for prepared Statement object.

    int result = stmt.execute();
  • Statement.lastInsertId() : Statement.execute() for insert sql, return lastInsertId.
项目地址:
https://github.com/huntlabs/database